[9] Dugu Yue, a former flight dynamics engineer, is hired as a maintenance man for Project United Nations Moon Shield (UNMS), an operation spearheaded by the Chinese government which is intended to protect the Earth from an incoming asteroid named "π".

Eight years after their launch, the Cosmic Strike Hammers successfully shatter "π"; but one of the missiles was thrown off course by a solar storm, leaving some of the asteroid fragments heading towards the UNMS Moon station.

A portion of humanity has survived the disaster in pre-built underground bunkers, but Earth's situation is rendered desperate by a global dust cloud blocking off the Sun's radiation.

UNMS chairman Sun Guangyang urges to establish a public livestream link to the station in order to portray Yue as a role model and thus raise hope among the surviving population.

Yue discovers that he has company in the form of a temperamental red kangaroo named "King Kong Roo", left behind by the UNMS research division.

Overhearing the news, Yue volunteers to guide his lander towards "π+" so that the Strike Hammer's warhead can destroy it, but on his way there he hits leftover debris from "π", which disables the missile's engine.

Lanxing returns to the Moon station, where she imagines being joined by Yue's spirit to watch the remains of "π+" settling in a stable orbit around the Earth as a planetary ring.

[11] Particular praise came from reviewer Carla Hay who says that the film "takes some familiar elements of “stranded survivor” stories and delivers a unique spin that people of many different generations can enjoy.